Effect of γ-radiation on structure, photoluminescence properties and in vitro cytotoxicity of LaPO4:Tb3+,Ce3+ phosphor

Lauric acid capped Ce3+ sensitized LaPO4:Tb3+ nanorods have been synthesized by hydrothermal route at 150 °C. The structure, stability and luminescent properties have been examined by TEM, TG/DTA, FT-IR, powder X-ray diffraction and PL spectral data. Cytotoxic activity has been examined by MTT assay. The LaPO4:Tb3+,Ce3+ phosphor exhibits four emission peaks at 485, 551, 583 and 619 nm corresponding to 5D4→7F6, 5D4→7F5, 5D4→7F4 and 5D4→7F3 transitions, respectively. The influence of γ-radiation on photoluminescence properties of LaPO4:Tb3+,Ce3+ phosphor has also been examined at 5 and 300 kGy. Furthermore, LaPO4 and LaPO4:Tb3+,Ce3+ phosphors exhibit 80–82% cytotoxic effect against breast cancer cell lines, MDA-MB 231 and MCF-7. The IC50 values for LaPO4 and LaPO4:Tb3+,Ce3+ phosphors are 17.2 and 13.5 µg/mL against MCF-7 and 21.5 and 15.0 µg/mL against MDA-MB 231 cell line, respectively

Piperazine-1,4-diium bis(2,4,5-tricarboxybenzoate) dihydrate

In the title hydrated salt, C4H12N22+·2C10H5O8−·2H2O, the piperazinediium cation, lying about an inversion center, adopts a chair conformation. The benzene ring of the anion makes dihedral angles of 25.17 (8)° with the carboxylate group and angles of 8.50 (7), 20.07 (7) and 80.86 (8)° with the three carboxylic acid groups. In the crystal, the cations, anions and water molecules are connected by O—H...O and N—H...O hydrogen bonds into double layers parallel to (110)

Synthesis, Structure, and Properties of New Mg(II)-Metal–Organic Framework and Its Prowess as Catalyst in the Production of 4<i>H</i>‑Pyrans

A new alkaline metal–organic framework, [Mg₃(NDC)₃(DMF)₄]·H₂O (<b>1</b>) is synthesized solvothermally by using 2,6-naphthalenedicarboxylic acid (NDC) as ligand and dimethylformamide (DMF) and water as mixed solvent. Single crystal X-ray studies show that <b>1</b> crystallizes in the space group <i>C2/c</i> with parameters <i>a</i> = 13.4191(2), <i>b</i> = 18.0669(2), <i>c</i> = 20.9746(3) Å, and β = 99.66(0)^o. The central metal atom Mg­(II) adopts a six coordinated octahedral geometry with carboxylate oxygen atoms and DMF molecules. Due to the involvement of oxygen atoms in bridging and chelation binding, a trinuclear secondary building unit is built up, which further connects to other six NDC ligands and finally leading to a three-dimensional network. The thermal and luminescent analysis revealed that the compound is thermally stable with violet emission. The creation of coordinatively unsaturated Mg­(II) centers, acting as Lewis-acidic sites upon activation, are explored to use <b>1</b> as heterogeneous catalyst in value-added organic conversions. MOF showed a superb catalytic performance in the synthesis of eight 4<i>H</i>-pyran derivatives via one-pot three-component reaction between aromatic aldehydes, malononitrile, and cyanoacetamide at room temperature. All the reactions worked exceptionally well with excellent yields (91–96%), in short reaction times (<40 min). Green solvent (ethanol) and easy separation, reusability and robust structure of catalyst are the attractions of the protocol and make [Mg₃(NDC)₃(DMF)₄]·H₂O an ideal catalyst for wide-ranging organic transformations

Simple and Efficient One-Pot Synthesis of 2-Substituted Benzimidazoles from θ-Diaminoarene and Aryl Aldehydes

<div><p></p><p>An easy and efficient one-pot condensation method for the synthesis of substituted benzimidazoles from θ-phenylenediamines with aryl aldehydes using urea hydrogen peroxide (UHP) and I₂ in dimethylsulfoxide (DMSO) provides wide substrate scope with good to excellent yields and simple and quick isolation of the products.</p></div

Copper(I) iodide–catalyzed amidation of phenylboronic acids/aryl bromides using 4-dimethylaminopyridine as ligand

<p>An efficient one-pot synthesis of <i>N</i>-arylbenzamide is described via reaction of phenylboronic acid/aryl bromide with benzamide in the presence of CuI (5 mol%) as catalyst, 4-dimethylaminopyridine (20 mol%) as the ligand, and Cs₂CO₃ (2 mmol) as the base. This protocol was applied to synthesize a small library of <i>N</i>-arylbenzamide in high yields.</p

Effect of <em>γ</em>-radiation on structure, photoluminescence properties and <em>in vitro</em> cytotoxicity of LaPO₄:Tb³⁺,Ce³⁺ phosphor

784-790Lauric acid capped Ce3+ sensitized LaPO4:Tb3+ nanorods have been synthesized by hydrothermal route at 150 °C. The structure, stability and luminescent properties have been examined by TEM, TG/DTA, FT-IR, powder X-ray diffraction and PL spectral data. Cytotoxic activity has been examined by MTT assay. The LaPO4:Tb3+,Ce3+ phosphor exhibits four emission peaks at 485, 551, 583 and 619 nm corresponding to 5D4→7F6, 5D4→7F5, 5D4→7F4 and 5D4→7F3 transitions, respectively. The influence of γ-radiation on photoluminescence properties of LaPO4:Tb3+,Ce3+ phosphor has also been examined at 5 and 300 kGy. Furthermore, LaPO4 and LaPO4:Tb3+,Ce3+ phosphors exhibit 80–82% cytotoxic effect against breast cancer cell lines, MDA-MB 231 and MCF-7. The IC50 values for LaPO4 and LaPO4:Tb3+,Ce3+ phosphors are 17.2 and 13.5 µg/mL against MCF-7 and 21.5 and 15.0 µg/mL against MDA-MB 231 cell line, respectively